Plague Case Confirmed in Pueblo County, Colorado

A human case of the plague has been confirmed in Pueblo County, Colorado, with health officials investigating the situation. The plague is caused by Yersinia pestis, a bacterium that was likely introduced in North America around 1900. Symptoms include severe headache, fever, chills, muscle aches, nausea, vomiting, and swollen lymph nodes. The disease can spread from rodents, fleas, or infected animals to humans.